Doeren Mayhew has ranked as the No. 1 credit union auditing firm in the nation for the third consecutive year according to the Callahan & Associates 2026 Supplier Market Share Guide: Credit Union Auditors publication.

Results were based on the total number of credit union audits performed for credit unions $40 million and above in assets, spotlighting the top-ranking firms in the United States. Over the last year, Doeren Mayhew performed audits for 336 credit unions, totaling over $460 billion in assets. 

“This recognition from Callahan & Associates is especially meaningful because it reflects the people who know our work best—our clients,” said John Murnane, practice leader of Doeren Mayhew’s Financial Institutions Group. “We take pride in delivering consistent timely service and earning their trust. Doeren Mayhew remains dedicated to the industry and meeting the needs of our clients.”

Doeren Mayhew has an extensive Financial Institutions Group practice of over 160 dedicated industry professionals, providing a range of audit, internal audit, accounting, regulatory compliance, lending review, tax and merger advisory services to hundreds of credit unions nationwide, ranging in size of up to nearly $26 billion in assets.